<template>
	<view class="uni-navbar" :class="{'uni-navbar-fixed':isFixed,'uni-navbar-shadow':hasShadow}" :style="{'background-color':backgroundColor}">
		<!-- <uni-status-bar v-if="insertStatusBar"></uni-status-bar> -->
		<view class="uni-navbar-header" :style="{color:color}">
			<view class="uni-navbar-header-btns">
				<!-- #ifdef H5 -->
				<!-- <uni-icon v-if="leftIcon.length" :type="leftIcon" :color="color" size="24" @tap="onClickLeft"></uni-icon> -->
				<!-- #endif -->
				<view v-if="leftText.length" class="uni-navbar-btn-text" :class="{'uni-navbar-btn-icon-left':leftText.length>0}">
					<text>{{leftText}}</text>
					<uni-icon type="arrowdown" size="16"></uni-icon>
				</view>
				<!-- <slot name="left"></slot> -->
			</view>
			<view class="uni-navbar-container">
				<view v-if="title.length" class="uni-navbar-container-title">{{title}}</view>
				<!-- 标题插槽 -->
				<slot name="title"></slot>
			</view>
			<view class="uni-navbar-header-btns" @tap="onClickRight">
				<view v-if="rightIcon.length">
					<uni-icon :type="rightIcon" :color="color" size="24"></uni-icon>
				</view>
				<!-- 优先显示图标 -->
				<view v-if="rightText.length>0" class="uni-navbar-btn-text" @tap="onClickLeft">{{rightText}}</view>
				<slot name="right"></slot>
			</view>
		</view>
	</view>
</template>

<script>
	import uniStatusBar from '@/components/uni-nav-bar/uni-status-bar/index.vue'
	import uniIcon from '@/components/uni-nav-bar/uni-icon/index.vue'

	export default {
		components: {
			uniStatusBar,
			uniIcon
		},
		props: {
			/**
			 * 标题文字
			 */
			title: {
				type: String,
				default: ''
			},
			/**
			 * 左侧按钮文本
			 */
			leftText: {
				type: String,
				default: ''
			},
			/**
			 * 右侧按钮文本
			 */
			rightText: {
				type: String,
				default: ''
			},
			/**
			 * 左侧按钮图标
			 */
			leftIcon: {
				type: String,
				default: ''
			},
			/**
			 * 右侧按钮图标
			 */
			rightIcon: {
				type: String,
				default: ''
			},
			/**
			 * 是否固定在顶部
			 */
			fixed: {
				type: [Boolean, String],
				default: false
			},
			/**
			 * 按钮图标和文字颜色
			 */
			color: {
				type: String,
				default: '#000000'
			},
			/**
			 * 背景颜色
			 */
			backgroundColor: {
				type: String,
				default: '#FFFFFF'
			},
			/**
			 * 是否包含状态栏，默认固定在顶部时包含
			 */
			statusBar: {
				type: [Boolean, String],
				default: ''
			},
			/**
			 * 是否使用阴影，默认根据背景色判断
			 */
			shadow: {
				type: String,
				default: ''
			}
		},
		computed: {
			isFixed() {
				return String(this.fixed) === 'true'
			},
			insertStatusBar() {
				switch (String(this.statusBar)) {
					case 'true':
						return true
					case 'false':
						return false
					default:
						return this.isFixed
				}
			},
			hasShadow() {
				var backgroundColor = this.backgroundColor
				switch (String(this.shadow)) {
					case 'true':
						return true
					case 'false':
						return false
					default:
						return backgroundColor !== 'transparent' && backgroundColor.indexOf('rgba') < 0
				}
			}
		},
		methods: {
			/**
			 * 左侧按钮点击事件
			 */
			onClickLeft() {
				this.$emit('clickLeft')
				this.$emit('click-left')
			},
			/**
			 * 右侧按钮点击事件
			 */
			onClickRight() {
				this.$emit('clickRight')
				this.$emit('click-right')
			}
		}
	}
</script>

<style>
	.uni-navbar {
		display: block;
		position: relative;
		width: 100%;
		background-color: #FFFFFF;
		overflow: hidden;
	}

	.uni-navbar view {
		line-height: 44px;
	}

	.uni-navbar-shadow {
		box-shadow: 0 1px 6px #ccc;
	}

	.uni-navbar.uni-navbar-fixed {
		position: fixed;
		z-index: 998;
	}

	.uni-navbar-header {
		display: flex;
		flex-direction: row;
		width: 100%;
		height: 44px;
		line-height: 44px;
		font-size: 16px;
	}

	.uni-icon-back {
		padding-right: 14upx;
	}

	.uni-navbar-btn-icon-left {
		padding-left: 10upx;
		font-size: 26upx;
	}

	.uni-navbar-header .uni-navbar-header-btns {
		display: inline-flex;
		flex-wrap: nowrap;
		flex-shrink: 0;
		padding: 0 12upx;
	}

	.uni-navbar-header .uni-navbar-header-btns:first-child {
		padding-left: 0;
	}

	.uni-navbar-header .uni-navbar-header-btns:last-child {
		/* width: 60upx; */
	}

	.uni-navbar-container {
		width: 100%;
		margin: 0 10upx;
	}

	.uni-navbar-container-title {
		font-size: 30upx;
		text-align: center;
		padding-right: 60upx;
	}
</style>
